Displaced vertices as probes of sterile neutrino mixing at the LHC

Giovanna Cottin, Juan Carlos Helo, Martin Hirsch

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49 Scopus citations

Abstract

We investigate the reach at the LHC to probe light sterile neutrinos with displaced vertices. We focus on sterile neutrinos N with masses mN∼(5-30) GeV that are produced in rare decays of the standard model gauge bosons and decay inside the inner trackers of the LHC detectors. With a strategy that triggers on the prompt lepton accompanying the N displaced vertex and considers charged tracks associated with it, we show that the 13 TeV LHC with 3000/fb is able to probe active-sterile neutrino mixings down to |VlN|2≈10-9, with l=e, μ, which is an improvement of up to 4 orders of magnitude when comparing with current experimental limits from trileptons and proposed lepton-jets searches. In the case when τ mixing is present, mixing angles as low as |VτN|2≈10-8 can be accessed.

Original languageEnglish
Article number035012
JournalPhysical Review D
Volume98
Issue number3
DOIs
StatePublished - 1 Aug 2018

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